16612532551 has 4 divisors (see below), whose sum is σ = 16653150400. Its totient is φ = 16571914704.

The previous prime is 16612532509. The next prime is 16612532603. The reversal of 16612532551 is 15523521661.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15523521661 = 17 ⋅913148333.

It is a cyclic number.

It is not a de Polignac number, because 16612532551 - 2²⁷ = 16478314823 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16612532551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16612502551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20308311 + ... + 20309128.

It is an arithmetic number, because the mean of its divisors is an integer number (4163287600).

Almost surely, 2^16612532551 is an apocalyptic number.

16612532551 is a deficient number, since it is larger than the sum of its proper divisors (40617849).

16612532551 is an equidigital number, since it uses as much as digits as its factorization.

16612532551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40617848.

The product of its digits is 54000, while the sum is 37.

The spelling of 16612532551 in words is "sixteen billion, six hundred twelve million, five hundred thirty-two thousand, five hundred fifty-one".